I recently had a look at the statistics and found in lwip_stats.etharp
Transmitted 4
Received 81 Dropped 48 Protocol error 48 Cache hit 41000 Now, 48 of 81 errors looks somehow alarming. Or is this normal? Where do these errors come from?
Have a look at etharp.c at the places where both dropped and err are increased an you see where it can come from! Most certainly, there has been something from with received ARP packets (etharp.c), but these counters could also be increased in your netif driver source file.
In etharp.c, there are multiple places where both counters are increased, so you might want to either debug this or add additional counters to see which one fired.
Simon |